<template>
  <view>
    <view class="search-box">
      <uni-search-bar :radius="100" @input="input" placeholder="请输入搜索内容" cancelButton="none" focus></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchList.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchList" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">
          {{item.goods_name}}
        </view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史区域 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <view class="history-list">
        <uni-tag :text="item" type="error" :circle="true" v-for="(item,i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        searchList:[],
        historyList:[]//搜索历史
      };
    },
    methods:{
      //输入事件
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          // console.log(e);
          this.kw = e;
          this.getSearchList();
        },500) 
      },
      async getSearchList(){
        if(this.kw.trim() === '') return this.searchList = [];
        const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchList = res.message;
        
        this.saveSearchHistory();
      },
      gotoDetail(item){
        // console.log(item.goods_id);
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      },
      saveSearchHistory(){
        // this.historyList = [...new Set([...this.historyList,this.kw].reverse())]
        for(let i in this.historyList){
          if(this.kw === this.historyList[i]){
            this.historyList.splice(i,1)
            this.historyList.unshift(this.kw)
            return uni.setStorageSync('kw',JSON.stringify(this.historyList));
          }
        }
        const set = new Set(this.historyList)
        // set.delete(this.kw)
        set.add(this.kw)
        this.historyList = [...set].reverse();
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clean(){//清空历史记录
        this.historyList = [];
        uni.removeStorageSync('kw')
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+item
        })
      }
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw')|| '[]') ;
    }
  }
</script>

<style lang="scss">
.search-box{
  background-color: #c00000;
  position: sticky;
  z-index: 9;
  top: 0%;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #eee;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #eee;
  }
  .history-list{
    display: flex;
    flex-flow: row wrap; 
    .uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
